Unit 5C WATER QUALITY

STUFF ABOUT WATER WATER DISSOLVES MANY THINGS NEARLY “UNIVERSAL SOLVENT” H2O

V-SHAPED POLAR MOLECULE WITH PARTIAL NEGATIVE MIDDLE (O-) AND PARTIAL POSITIVE ENDS (H+)

HYDROGEN BONDS POSITIVE H ATOMS ATTRACT NEGATIVE O ATOMS FROM OTHER WATER MOLECULES HELPS PLANTS PULL WATER UP STEM AS MOLECULES “HOLD HANDS”

DISSOLVING IN WATER POLAR MOLECULES have PARTIAL POSITIVE and PARTIAL NEGATIVE SECTIONS So, they DISSOLVE WELL in WATER NONPOLAR MOLECULES are NEUTRAL ALL OVER So, they WON’T DISSOLVE in WATER like WAX or OIL or BUTTER

WAKE UP, EVERYONE !!!

CHEMICALS IN OUR WATER CHLORINE to KILL BACTERIA FLUORINE for STRONG TEETH LEAD, IRON, COPPER from PIPES ACID (H+) from SOIL EATS UP PIPES BASE (OH-) from CALCIUM and MAGNESIUM NEEDED for HUMAN HEALTH

The WATER CYCLE (HYDROLOGIC CYCLE) EARTH’S TOTAL WATER STAYS THE SAME 97% is SALT WATER 2% is ICE ONLY 1% is FRESHWATER !!!

WHERE THE WATER IS - OCEANS -SURFACE WATER -GROUNDWATER in AQUIFERS - ACIDIC with DISSOLVED MINERALS, but DISEASE-FREE -VAPOR in ATMOSPHERE -COMES FROM EVAPORATION AND TRANSPIRATION - CLOUD SEEDING to MAKE MORE RAIN

WHAT HAPPENS TO WATER EVAPORATION TRANSPIRATION from PLANTS CONDENSATION in CLOUDS PRECIPITATION RAIN, SNOW, HAIL, and SLEET CAUSE SURFACE RUNOFF

WATER QUALITY TEMPERATURE DISSOLVED OXYGEN Fish Die if this is too low BIOLOGICAL OXYGEN DEMAND (BOD) - Measures ORGANIC MATERIAL in water

WATER QUALITY Ph - ACIDIC or BASIC Acid Rain TURBIDITY (CLOUDINESS) NITRATE from DECAY and FERTILIZERS PHOSPHATE - DETERGENTS and FERTILIZERS

ALGAL BLOOMS Too much Fertilizer (Nitrate or Phosphate) in Surface Runoff causes too much algae to grow ALGAE use up Oxygen FISH die from low oxygen level

BYE, Y’ALL DON’T WASTE WATER!!